Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011apjs..196...17k&link_type=abstract
The Astrophysical Journal Supplement, Volume 196, Issue 2, article id. 17 (2011).
Astronomy and Astrophysics
Astronomy
1
Ism: Molecules, Line: Identification, Molecular Data, Radio Lines: Ism, Submillimeter: Ism
Scientific paper
The rotational spectra of 29SiC2 and 30SiC2, two silicon isotopic species of the abundant astronomical ring 28SiC2, have been characterized in the millimeter band between 140 and 360 GHz in a low pressure discharge through SiH4, C2H2, and Ar. Precise rotational and centrifugal distortion constants have been derived for both species by fitting a standard asymmetric top Hamiltonian to 38 a-type transitions of 29SiC2 and 35 of 30SiC2; the data sets include transitions up to Ka = 8 and at least J = 16. With these new measurements in hand, the most intense radio transitions of both species either have been measured or can now be predicted to better than 1 km s-1 in equivalent radial velocity up to 500 GHz, more than adequate accuracy for spectral line identifications in circumstellar shells of evolved carbon stars such as IRC+10216 where SiC2 is conspicuous. More than 10 new lines of 29SiC2 and 30SiC2 have been identified between 295 and 354 GHz in the interferometric spectral line survey of IRC+10216 with the Submillimeter Array.
Brunken Sandra
Gottlieb Carl A.
Kokkin Damian L.
McCarthy Mary C.
Patel Nimesh A.
No associations
LandOfFree
The Rotational Spectra of 29SiC2 and 30SiC2 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Rotational Spectra of 29SiC2 and 30SiC2, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Rotational Spectra of 29SiC2 and 30SiC2 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1815451